DTC 12-120, 14-120, 16-120, 18-120

DTC 12-120  : Right-Front Wheel Speed Sensor Circuit Malfunction

DTC 14-120  : Left-Front Wheel Speed Sensor Circuit Malfunction

DTC 16-120  : Right-Rear Wheel Speed Sensor Circuit Malfunction

DTC 18-120  : Left-Rear Wheel Speed Sensor Circuit Malfunction

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTCs (VSA)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Test-drive the vehicle.

   NOTE:  Drive the vehicle on the road, not on a lift.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   12-120 Right-Front Wheel Speed Sensor Circuit Malfunction
   14-120 Left-Front Wheel Speed Sensor Circuit Malfunction
   16-120 Right-Rear Wheel Speed Sensor Circuit Malfunction
   18-120 Left-Rear Wheel Speed Sensor Circuit Malfunction

   Is DTC 12-120, 14-120, 16-120, or 18-120 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

2. Shorted wire check (Wheel speed sensor lines to power)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   VSA modulator-control unit 21P connector

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between body ground and the appropriate wheel speed sensor +B terminals of the VSA modulator-control unit 21P connector individually (see table).

   Test condition	Vehicle ON mode
   	VSA modulator-control unit 21P connector: disconnected

   DTC	VSA Modulator-Control Unit 21P Connector Terminal	Appropriate Wheel Speed Sensor 2P or 4P Connector Terminal
   12-120	No. 14	Right-front
   14-120	No. 12	Left-front
   16-120	No. 11	Right-rear
   18-120	No. 13	Left-rear

   Is there 0.1 V or more?

   YES 

   Repair a short to power in the wires between the appropriate wheel speed sensor and the VSA modulator-control unit.

   NO 

   The wheel speed sensor wires are not shorted to power. Go to step 3.

3. Wheel speed sensor check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Reconnect the following connector.

   VSA modulator-control unit 21P connector

   -3. Substitute a known-good wheel speed sensor .

   DTC	Appropriate WheelSpeed Sensor
   12-120	Right-front
   14-120	Left-front
   16-120	Right-rear
   18-120	Left-rear

   -4. Turn the vehicle to the ON mode.

   -5. Clear the DTC with the HDS.

   -6. Turn the vehicle to the OFF (LOCK) mode.

   -7. Test-drive the vehicle.

   NOTE:  Drive the vehicle on the road, not on a lift.

   -8. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   12-120 Right-Front Wheel Speed Sensor Circuit Malfunction
   14-120 Left-Front Wheel Speed Sensor Circuit Malfunction
   16-120 Right-Rear Wheel Speed Sensor Circuit Malfunction
   18-120 Left-Rear Wheel Speed Sensor Circuit Malfunction

   Is DTC 12-120, 14-120, 16-120, or 18-120 indicated?

   YES 

   Check for loose terminals in the VSA modulator-control unit 21P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit .

   NO 

   Replace the original wheel speed sensor .